Automatic antifreeze system for auto radiators



March 1929- s. L. HERZLICH 1,705,729-

AUTOMATIC ANTIFREEZE SYSTEM FOR AUTO RADIATORS Filed March 19, 1927Patented Mar. 19 1929.

sAMUEn L. HER-ZLICH, or BROOKLYN, NEW YORK.

AUTOMATIC ANTIFREEZE SYSTEM FOR AUTO RADIATORS.

Application filed March 19, 1927. Serial 'No. 176,653.

The object of my invention is to afford simple, but effective meanswhereby the temperature of the water of the circulatory cooling systemof an internal combustion engme and 6 its radiator, as used inautomobiles, may

be automatically maintained above a prescribed degree to preventfreezing of the liquid when the motor is at rest infreezmg weather, thusobviating danger of 1ll]ll1y to the mechanism and delay in operation;and to this end the invention consists substantially in the combinationand co-relation, in electrical circuit, of an electric heating elementpositioned in the lower part of the cooling liquid circuit, and of athermostat connected with and controlling said heating element andassociated closely with the engine 1n the zone of heat generated therebywhereby when the engine has become sufficiently heated the current tothe heater will be cut ofi? and electrical energy conserved.

In the accompanying drawings, I 1llustrate the preferred embodiment ofmy invention as applied to a motor of the character designated, althoughI do not restrict myself to the identical construction and arrangementof parts and connections shown by way of er:- emplification, sincechanges may be made in minor details, and equivalent mechanicalexpendients resorted to with like results, and without departing fromthe spirit and intent of my invention in this respect.

With this understanding Fig. 1, represents more -or lessdiagrammatically an elevation of a motor and its radiator equipped withmy antifreeze means in which arrangement the thermostat is connectedwith the exhaust manifold;

Fi 2, is a central longitudinal section of the e ectric heating elementcasing, the heating element being indicated symbolically in elevation;

Fig. 3, is a sectional elevation taken upon plane of line 3-3, Fig. 1,showing the thermostat mount;

Fig. 4, is .a diagram of the electric circuit involved;

In Fig. 1, the engine casing C, and certain other parts of the motor areindi-' cated in outline. The water jacket portion is connected by theupper outgoing liquid conduit 0", with the top of the radiator R, thebottom of which latter is connected with I cult is closed said waterjacket 0, throu h the medium of the lower return conduit c'-, pump 0 andreturn conduit 0 as is usual in such cases, the fluid in said coolingsystem being circulated by said pump in the direction of the arrows.

The electrical heat element H, is enclosed in a tubular casing it,inserted in a section 0 of the lower liquid return conduit 0 as shownmore particularly in Fig. 2 of the drawings, its function being toimpart a gentle heatunder certain conditions to the liquid in thecooling system to prevent freezing and the attending dangers.

In a similar manner the thermostat T, is enclosed in a tubular casing t,inserted either in an offset m, of the engine exhaust manitold M, asshown in Figs. 1 and 3, of the draw- 1ng's.

The electrical heating element H, and the thermostat T, are included ina common electric circuit 6, e, which when closed is energized by abattery B, or other source of electricity. For instance, when theelectric cirby the thermostate T, the current passes from the battery Bthrough the wire 6, to and through the thermostat T, and wire e, to theheating element H, and thence to the battery through a common ground asshown in Fig. 4-.

An obvious result is that if the thermostat T, is set to close theelectrical circuit at a temperature of, say, 35 Fahrenheit, or anyprescribed degree above the freezing point of the circulatory liquid,whenever the latter cools sufiiciently the thermostat will automaticallycause the energizing of the heating element H, and thereby maintain asafe temperature throughout the water cooling system, or in other words,will prevent freezing.

\Vhen the engine is started the heat generated thereby will act almostinstantly on the thermostat T, so as to open the circuit and cut off thecurrent to the heater and so conserve the current.

It is to be understood that the storage battery with which automobilesare usually equipped may be utilized as the source of electrical energyfor the heating element as thus controlled by the thermostat, and thatthe latter will close the circuit automatically when the temperaturedrops to the prescribed minimum degree, and automatically open thecircuit when that degree of heat is exceeded,

the sole object being to maintain the engine the water pipes for heatingthe water therein, system, as a unit, in operative condition athermostat carried by the exhaust pipe so when exposed to external cold,as in winter. as to be heated by the heat of gases of com- Vhat I claimas my invention and desire bustion, and a source of current; the heater,15 5 to secure by Letters Patent, is thermostat and source of currentbeing con- In a water-cooled internal combustion ennected so that thethermostat will open the gine, having .a radiator, pipes for leadingcircuit throu h the heater as soon as the-enwater to and from theradiator, and an exgine is starte ,and will close the circuit when haustpipe for carrying away the ases ofthe engine has cooled to a certaintempera- 20 10 combustion from the engine, the com ination ture.

of an electrical heater positioned in one of SAMUEL L. HEBZLICH.

